Hakan Erdoğan Yazıları

Commercial Contracts Checklist

I am managing supply chain, procurement and logistics operations of multinational companies in Europe and Middle East Africa Region for more than 10 years. During this period I finalized more than 500 million euro worth of contracts (logistics, raw materials, service, products,..). While negotiating contracts I have observed, experienced many points which are not given enough attention and created [...]

Notes on Turkish Economy

Here are some brief notes & statistics on some aspects of Turkish economy & business: Wealth Inequality: 86 thousand, 0.13 % of the bank accounts in Turkey has 51% of the all the deposits.   Number of millionaires increased by %12 in the first half of 2015. Another statistics in wealth inequality area is from Research Institute on Turkey. In 2014, richest 1% has 54.5 % of the total wealth [...]

History of Modern Economic Thought


Starting from ancient times there were many thinkers and theories in the history of economic thought. The first modern school of economic thought is generally considered as Classical Economy (1776 – 1870). Starting with Adam Smith main founders of classical economy are Jean-Baptiste Say, David Ricardo, Thomas Malthus and John Stuart Mill. Free markets regulating themselves without any intervention [...]

Turkish Economy: Biggest 500 Companies & 2015 Outlook


Monthly Turkish business magazine Capital’s published its Turkey’s Biggest 500 companies list (for 2013) couple of months ago. Here are some of my findings out of that list: Companies in this list had 8% real growth, while Turkish Economy as a whole grow by 4% in 2013. However average real profit of the 500 list went down by 18% 257 out of 500 had growths in double digits. Only 47 of them made [...]

The Four Agreements – Don Miguel Ruiz


Thousands of years ago, the Toltec were known throughout Southern Mexico as “women and men of knowledge”. They were scientists and artists who formed a society to explore and conserve the spiritual knowledge and practices of the ancient ones. Don Miguel Ruiz is a Mexican a surgeon who dedicated his life to sharing the wisdom of the ancient Toltec. The Four Agreements, his most successful book, [...]

Outliers: The Story of Success – by Malcolm Gladwell


“Success is a combination of ability, opportunity, time, luck, effort, family background and network.” This is would I say about this book if asked to summarize in one sentence.  Outliers is a popular book written by Malcolm Gladwell in 2008. It was listed in the 1st place in bestseller lists in New York Times and a couple of other journals and in 2014, its Turkish translation listed as bestseller [...]



In all of human history, there may never have been a better time to be alive. Worldwide, the average life expectancy is 71 years, more than double what it was in 1900. The material and cultural wealth we now have is unparalleled in the human history. We are, by historical standards, rich. But are we getting happier as we are getting richer? One of the posts that I wrote earlier this year was named [...]

Skygazing: Brightest Stars of Summer


A couple of months ago, I wrote about the brightest starts of winter. To recap briefly they were Orion (constellation, with its famous belt), Rigel, Betelgeuse, Sirius, Aldebaran, Capella, Procyon, Pollux and Castor (Gemini, the twins). Now that winter is over, I would like to make a similar post about summer stars. In the table below, I listed 21 brightest (1st magnitude) stars in the order of brightness. [...]

Philosophy – Solipsism


I mentioned in my previous post named “Philosophy – Several Concepts” that I do not consider myself as an expert in philosophy, and that is still valid :) This time I would like to discuss about solipsism concept. It is one of the most extreme concepts one would see in philosophy, and before starting to write about it I wish to say I am personally neutral about solipsism concept. I mean I do [...]

The Checklist Manifesto – Atul Gawande


“We look for medicine to be an orderly field of knowledge and procedure. But it is not. It is an imperfect science, an enterprise of constantly changing knowledge, uncertain information, fallible individuals, and at the same time lives on the line. There is science in what we do, yes, but also habit, intuition, and sometimes plain old guessing. The gap between what we know and what we aim for persists. [...]

Classical Guitar


I believe doing sport and playing musical instrument enrich people’s lives a lot.  I have been doing various kinds of sports since I was a teenager and sport makes up a significant part of my life.  From time to time I was thinking about playing a musical instrument and finally four months ago I started taking classical guitar course. In this post I would like to share some of my learning’s about [...]

Thinking, Fast and Slow – Daniel Kahneman


Daniel Kahneman, who won the Nobel in economic science in 2002, is one of the most prominent psychologist in understanding the way we think and make decisions. Thinking Fast and Slow (2011), his most recent book, says a lot about about how we think, react, and reach conclusions in all walks of life. Human behavior, cognitive science, psychology, irrationality and rationality are Kahneman’s main focus [...]

Chess – My Lifelong Passion


When I started my professional business life, approximately 10 years ago, I read in an HBR article following: “Average managers play checkers, while great managers play chess. The difference? In checkers, all the pieces are uniform and move in the same way; they are interchangeable. You need to plan and coordinate their movements, certainly, but they all move at the same pace, on parallel paths. [...]

Influence: The Psychology of Persuasion by Robert Cialdini


People want to get the most and pay the least for their choices. This basic human motivation plays a key role in our thinking system. Yet there is not simply enough time to think thoroughly about thousands of decisions we make every day. There is even a popular saying that “civilization advances by extending the number of operations they can perform without thinking about them”. “Influence: The [...]

Special & General Relativity Theories


The speed of light is 229,792,458 meters per second in the vacuum of empty space. Traveling at this speed, it takes 8 minutes to travel between earth and sun, 100 thousand years to cross our own galaxy, Milky Way and over 2 million years to reach our nearest galactic neighbor, Andromeda. The constancy of speed of light is one of the major postulates of special relativity theory. There are 3 main pillars [...]

Zig Ziglar : Positive Thinking and Motivation


Life is full of ups and downs. During these cycles, staying positive can help improve quality of life a lot.  To stay positive, everyone needs some motivation and inspiration from time to time. In this area, Zig Ziglar (1926 – 2012) is considered to be one of the legends. His most productive period was way before my generation yet still I had the opportunity to read some of his books. Among them [...]

Siddhartha & Shantaram


Siddhartha and Shantaram are two bestselling novels, taking place in India. Almost a year after reading Siddhartha, I read Shantaram and it reminded me of Siddhartha, perhaps because both stories happening in India and lots of eastern philosophy in them. Both books deal with the journeys of extraordinary men, with 2500 years difference. Below there is a quick synopsis of these two novels to briefly [...]

Turkish Automotive Industry


The world’s leading B2B trade fair for the automotive industry, automechanika, took place in Istanbul between 10-13 April 2014. As an automotive industry professional, I consider automechanika as a valuable platform to participate for OEMs, suppliers and purchasing professionals. It brings together all relevant professionals from the entire automotive supply chain: manufacturing, sales, purchasing, [...]